US7311492B2 - Duct fan - Google Patents

Duct fan Download PDF

Info

Publication number
US7311492B2
US7311492B2 US11/273,359 US27335905A US7311492B2 US 7311492 B2 US7311492 B2 US 7311492B2 US 27335905 A US27335905 A US 27335905A US 7311492 B2 US7311492 B2 US 7311492B2
Authority
US
United States
Prior art keywords
impeller
housing
duct
outlet
fan according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US11/273,359
Other languages
English (en)
Other versions
US20060127213A1 (en
Inventor
Hans Östberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20060127213A1 publication Critical patent/US20060127213A1/en
Application granted granted Critical
Publication of US7311492B2 publication Critical patent/US7311492B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings

Definitions

  • the present invention relates to a duct fan adapted to be arranged in a duct for transport of air between an upstream duct part and a downstream duct part according to the description herein.
  • duct fans are fans installed in ducts for transport of air for forcing air through these ducts and they are sometimes also called “in line centrifugal fans”.
  • the ducts may be of any type in which it is a desire to transport air, such as ventilation ducts in any type of building, such as in dwelling houses, in industrial premises, in sports halls and the like, and air is here to be interpreted to include any gases or gas mixtures, such as air contaminated with any other gas, such as carbon monoxide.
  • Duct fans for transport of air in circular ducts were until now mostly so-called circular duct fans having an impeller with the axis of rotation substantially in parallel with the direction of the main transport of air from the inlet to the outlet of the fan and when installed between an upstream duct part and a downstream duct part by that substantially in parallel with the extension of that duct in that region.
  • circular duct fans require comparatively much space in the direction perpendicular to said axis of rotation of the impeller, which often means in the vertical direction, since the ducts in question are often extending directly under or in ceilings of buildings. This means a waste of space that may be utilised in a more efficient way.
  • the pressure that may be obtained through such a circular duct fan in a duct is not as high as desired, at the same time as the noise level is rather high.
  • Duct fans of the type defined in the description herein i.e. having a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from the inlet to the outlet, have for that sake been put on the market.
  • Such duct fans may be constructed with smaller dimensions in the transversedirection thereof, i.e. in the direction substantially perpendicular to the direction of the main transport of air from the inlet to the outlet, which in the practice means a lower height and less space demand in that context.
  • a duct fan is preferred with respect to a circular duct fan also with respect to obtainable pressure, noise level and efficiency, there is a desire to further improve the properties thereof.
  • the object of the present invention is to provide a duct fan of the type defined in the introduction, which is improved with respect to such duct fans already known.
  • This object is according to the invention obtained by designing the outlet connecting member of such a duct fan to define an air flow path tapering substantially conically in the outlet towards the end of that member adapted to adjoin to a said downstream duct part.
  • the centre line of the opening of the outlet connecting member cone for connecting to a said downstream duct part when viewing the housing in the direction of the axis of rotation of the impeller, is substantially offset with respect to a centre line of the housing extending from said first to said second housing side.
  • Such an offset location of said opening further improves the properties mentioned above of the duct fan, and this is in particular the case when the outlet connecting member then is adapted to define said air flow path by wall portions extending substantially rectilinearly from the outer boarder of said second housing side to said end for adjoining to a said downstream duct part, so that the degree of tapering of said wall portions will differ as a consequence of said offset location of said opening.
  • the impeller has blades curved backwards with respect to the rotation direction of the impeller.
  • Such an impeller is particularly preferred, since the fan will work very efficient without any need of any particular guiding means, so that the impeller may be arranged in a space in said housing laterally delimited by lateral walls of the housing and opening directly into said outlet connecting member, and walls defining said space are adapted to alone take care of the guiding of airflow generated by the impeller inside said space. This also means saving of costs for the construction of the fan.
  • the impeller has blades curved forwards with respect to the rotation direction of the impeller, and a worm plate is arranged in a space in said housing containing the impeller for guiding the airflow generated by the impeller inside said space.
  • the axis of rotation of the impeller is offset with respect to a centre line of the housing extending from said first to said second housing side. Such an offset location of the impeller further improves the efficiency and capacity of the fan.
  • the inlet connecting member is designed to define an airflow path expanding substantially conically from the end of that member adapted to adjoin to a said upstream duct part and towards said housing.
  • the use of such a conical connecting member also for the inlet contributes to improved properties with respect to obtainable flow and pressure and efficiency of the duct fan.
  • said opening of the outlet connecting member cone and said opening of the inlet connecting member cone are substantially aligned, when viewing the housing in the direction of the axis of rotation of the impeller, since this means that the duct fan may be connected to an upstream duct part and a downstream duct part being aligned, so that the duct fan will in the practise constitute a duct part with a substantially rectilinear extension. Thanks to this conical design of the inlet and outlet connecting members it is possible to have this alignment without reducing the efficiency of the fan.
  • the interior of the housing is divided into two rooms by a partition wall extending substantially perpendicularly to the axis of rotation of the impeller, namely an inlet room and an outlet room, the impeller being arranged in the outlet room, and the partition wall is provided with an opening at the location of the impeller for sucking in air from the inlet room into the outlet room by rotation of the impeller, which is a favourable way of realising a duct fan having an impeller with the axis of rotation substantially perpendicular to the direction of the main transport of air from the inlet to the outlet.
  • the duct fan comprises a guide plate extending inside the inlet room substantially in the direction of a said upstream duct part to which the inlet connecting member is adapted to be connected and across said opening in the partition wall while dividing this into substantially equal parts.
  • the arrangement of such a guide plate further improves the capacity of the duct fan by stopping detrimental rotations of air in the inlet of the fan.
  • a plate for suspension of the impeller with motor is designed as a lid hinged with respect to the housing for enabling pivoting of this lid upwards for lifting the impeller with motor out of said housing for inspection, maintenance and/or cleaning.
  • FIG. 1 is a view from above of a duct fan according a preferred embodiment of the invention with parts of the walls broken away,
  • FIG. 2 is a perspective view of the duct fan according to FIG. 1 with parts of the walls broken away,
  • FIG. 3 is a perspective view obliquely from below of the duct fan according to FIGS. 1 and 2 .
  • FIG. 4 is a perspective view of a duct fan in which an impeller with motor is lifted out of the housing for inspection, maintenance and/or cleaning.
  • the duct fan 1 is adapted to be arranged in a duct for transport of air between an upstream duct part 2 and a downstream duct part 3 schematically indicated in FIG. 1 .
  • These two duct part 2 , 3 are in this case in line, and a fan of this kind is also called an in line fan.
  • the fan comprises a housing 4 preferably made of metal sheet and having substantially the shape of a rectangular parallelepiped and inside thereof a fan member in the form of an impeller 5 and a schematically indicated motor 6 for rotation thereof.
  • a duct fan of this type has typically an air flow of 0.10 m 3 /sec-3 m 3 /sec, but the invention is not restricted to this range.
  • the fan also comprises a member 7 for connecting a first inlet side 8 of the housing to a said upstream duct part for sucking air in therefrom and a member 9 for connecting a second outlet side 10 of the housing located opposite to said first side to a said downstream duct part for exhausting air thereto.
  • the inlet connecting member is designed to define an airflow path expanding substantially conically from the end 11 of that member adapted to adjoin to a said upstream duct part and towards said housing 4 .
  • the impeller 5 is a radial impeller having the axis of rotation substantially perpendicular to the direction of the main transport of air from said inlet to said outlet, and when viewing the housing in the direction of the axis of rotation of the impeller, the centre line of the opening 30 of the inlet connecting member cone for connecting to a said upstream duct part is substantially offset with respect to a centre line of the housing extending from said first to said second housing side.
  • the inlet connecting member is adapted to define said airflow path by wall portions extending substantially rectilinearly from the outer boarder of said first housing side 8 to said end 11 for adjoining to a said upstream duct part, so that the degree of diverging of said wall portions will differ as a consequence of said offset location of said opening.
  • the outlet connecting member 9 has a similar design to that of the inlet connecting member, and it is designed to define an airflow path tapering substantially conically in the outlet towards the end 12 of that member adapted to adjoin to a said downstream duct part.
  • the centre line of the opening 13 of the outlet connecting member cone for connecting to a said downstream duct part is substantially offset with respect to a centre line of the housing extending from said first to said second housing side.
  • This offset location of the outlet means that the outlet may be more concentrated to the location where the air is exhausted from the impeller, and the exhaust side of the impeller laterally seen shall be on the same side of the housing centre line as said outlet centre line as seen in the direction of the axis of rotation of the impeller.
  • the outlet connecting member 9 is also adapted to define said airflow path by wall portions extending substantially rectilinearly from the outer boarder of the second housing side 10 to said end 12 for adjoining to a said downstream duct part, so that the degree of tapering of said wall portions will differ for wall portions at different circumferential locations with respect to the opening 13 as a consequence of said offset location of said opening.
  • This design of the outlet connecting member of a duct fan according to the invention reduces the noise level of the fan and improves the capacity thereof substantially, especially in connection with the design and location of the impeller as described further below.
  • the interior of the housing 4 is divided into two rooms by a partition wall 14 extending substantially perpendicularly to the axis of rotation of the impeller, namely an inlet room 15 and an outlet room 16 .
  • the partition wall 14 has also an end part 17 extending in an angle to the other part for increasing the cross-section of the inlet room 15 towards the inlet connecting member 7 and an end part 24 closing the inlet room with respect to the outlet of the outlet connecting member 9 .
  • the impeller 5 is arranged in the outlet room, and the partition wall 14 is provided with an opening 18 having a nozzle 25 extending into the outlet room 16 at the location of the impeller for sucking in air from the inlet room 15 into the outlet room 16 by rotation of the impeller.
  • the fan also comprises a guide plate 19 shown in FIG. 3 and extending inside the inlet room substantially in the direction of said upstream duct part to which the inlet connecting member is adapted to be connected and across said opening 18 in the partition wall 14 while dividing this in two substantially equal parts.
  • This guide plate increases the capacity of the fan by stopping rotation of air in the inlet of the fan.
  • the impeller 5 has blades 20 curved backwards with respect to the rotation direction of the impeller.
  • the impeller may be arranged in said outlet room 16 in said housing laterally delimited by lateral walls 21 , 22 and opening directly into the outlet connecting member while walls defining the outlet room 16 are adapted to alone take care of the guiding of airflow generated by the impeller inside said outlet room.
  • no worm or shell plate is needed for efficiently forcing the air sucked in through the opening 18 in the partition wall towards the opening 13 to a downstream duct part thanks to the construction of the impeller with blades being curved backwards.
  • the impeller is arranged with the axis of rotation thereof offset with respect to the centre line of the housing. This location improves the capacity, i.e. pressure/flow, of the duct fan according to the invention further.
  • the impeller 5 with motor is suspended in a substantially rectangular plate 23 .
  • the plate 23 for suspension of the impeller with motor is designed as a lid hinged with respect to the rest of the housing for enabling pivoting of this lid upwards for lifting the impeller with motor out of said housing for inspection, maintenance and/or cleaning as shown in FIG. 4 .
  • the impeller has lower circumferential portions 26 adapted to form a wrap over with respect to said nozzle 25 with a small clearance when the lid 23 is swung down for guiding substantially all air from the inlet room to the outlet room through the impeller.
  • the function of the duct fan appears clearly from above but will now be briefly summarised.
  • the impeller located inside the outlet room 16 will suck air into the opening 30 of the inlet connecting member 7 into the inlet room 15 and through the opening 18 the outlet room 16 and through the conically tapering outlet connecting member to the opening 13 thereof into a downstream duct part.
  • the design of the outlet connecting member so that this part gets a cross section gradually decreasing in the direction of the opening 13 into a downstream duct part is the most essential feature improving the capacity and the efficiency of the duct fan, and it is also favourable for reducing the noise level thereof. Thanks to the use of an impeller having blades curved backwards material and costs are also saved, since no worm or shell plate is needed for guiding the air inside the outlet room.
  • the offset location of the opening 13 of the outlet connecting member cone with respect to especially the axis of rotation of the impeller is also favourable for the capacity and efficiency of the fan.
  • the cone of the outlet connecting member does not extend from the outer boarder of the second housing side, but from end wall portions of said parallelepiped extending slightly inwards from this outer boarder, but an extension from the outer boarder would in most cases be preferred.
  • outlet connecting member as well as the inlet connecting member have a short circular flange at the opening to the respective duct part, and it is pointed out that such a design of the respective connecting member is within the definitions of the designs of these members made in the description and in the claims.
  • impeller arranged centrally, i.e. with the axis of rotation thereof on said housing centre line, when an impeller having blades curved backwards is used.
  • the four walls of the fan extending from the inlet to the outlet thereof are preferably externally covered by a layer with sound and fire insulating properties, such as of glass wool or mineral wool and having typically a thickness of 3-6 cm. At the position of the lid this layer is then divided for forming a separate lid thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/273,359 2004-11-12 2005-11-14 Duct fan Expired - Fee Related US7311492B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP041057373 2004-11-12
EP04105737A EP1657451A1 (en) 2004-11-12 2004-11-12 A duct fan

Publications (2)

Publication Number Publication Date
US20060127213A1 US20060127213A1 (en) 2006-06-15
US7311492B2 true US7311492B2 (en) 2007-12-25

Family

ID=34929852

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/273,359 Expired - Fee Related US7311492B2 (en) 2004-11-12 2005-11-14 Duct fan

Country Status (4)

Country Link
US (1) US7311492B2 (ru)
EP (1) EP1657451A1 (ru)
CN (1) CN100523520C (ru)
RU (1) RU2384752C2 (ru)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090246017A1 (en) * 2008-03-28 2009-10-01 Delta Electronics, Inc. Fan and fan frame thereof
US20130260664A1 (en) * 2012-03-30 2013-10-03 Rockwell Automation Technologies, Inc. Eccentric fan housing
US9714663B1 (en) * 2004-03-15 2017-07-25 Airius Ip Holdings, Llc Temperature destratification systems
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10184489B2 (en) 2011-06-15 2019-01-22 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
US10641506B2 (en) 2013-12-19 2020-05-05 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
US10731668B2 (en) * 2017-05-17 2020-08-04 HELLA GmbH & Co. KGaA Retainer arrangement for the mounting of a fan on a light module of a headlamp for a vehicle
US10989209B2 (en) * 2017-09-30 2021-04-27 Beijing Xiaomi Mobile Software Co., Ltd. Fan
USD926963S1 (en) 2012-05-15 2021-08-03 Airius Ip Holdings, Llc Air moving device
US20220290688A1 (en) * 2019-07-09 2022-09-15 Ziehl-Abegg Se Fan with scroll housing and scroll housing for fan
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2442979B (en) * 2006-10-17 2011-10-05 Farmer Controls Plc Extraction unit
ES2344321T3 (es) * 2007-03-05 2010-08-24 Hans Ostberg Ventilador con cuerpo envolvente.
ITPD20070081U1 (it) * 2007-09-28 2009-03-29 Ln 2 Srl Socio Unico Collettore a chiocciola per ventilatore con sistema perfezionato di connessione ad una struttura di caldaia o simili
FR2931930B1 (fr) * 2008-06-03 2010-08-20 Aldes Aeraulique Caisson pour groupe moto-ventilateur
JP2011012945A (ja) * 2009-07-04 2011-01-20 Ashida Mfg Co Ltd オートクレーブの熱風循環方法とオートクレーブの熱風循環装置
ES2400098B1 (es) * 2011-02-28 2014-02-06 Soler & Palau Research S.L. Ventilador helicocentrifugo
DE102013000378B4 (de) * 2013-01-07 2015-04-09 Systemair GmbH Rohrventilator
WO2014135396A1 (en) * 2013-03-08 2014-09-12 Fergas Ab Fan unit
JP2014238228A (ja) * 2013-06-07 2014-12-18 矢崎エナジーシステム株式会社 メンテナンスを容易化したハンドリングユニット
CN103821739A (zh) * 2014-03-17 2014-05-28 胡和萍 一种管道排风扇
CN105545822A (zh) * 2016-02-25 2016-05-04 太仓钰丰机械工程有限公司 一种带有咬合叶的硅油风扇离合器
GB2550588B (en) * 2016-05-23 2020-12-23 Vent Axia Group Ltd Extractor fans
CN108837538B (zh) * 2018-06-25 2021-01-05 湖南尚花科技有限公司 一种冷焰火喷发设备
CN109386867B (zh) * 2018-09-19 2024-03-29 珠海格力电器股份有限公司 暖风机
ES2777923B2 (es) * 2019-02-06 2020-12-14 Soler & Palau Res Sl Conjunto extractor para ser instalado intercalado en un conducto de aire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911111A (en) 1958-07-22 1962-11-21 John Bass Ltd Improvements in centrifugal fan assemblies
US3312386A (en) * 1964-12-21 1967-04-04 Ametek Inc Fan
US3726611A (en) 1970-05-29 1973-04-10 Svenska Flaektfabriken Ab Fan unit designed as an air treatment device in an air conditioning aggregate
GB1326237A (en) 1970-12-10 1973-08-08 Blaws Eng Products Ltd Flue fan unit
FR2710700A1 (fr) 1993-09-27 1995-04-07 Abb Flakt Agencement d'un groupe moto-ventilateur monté en caisson.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2040179U (zh) * 1988-12-28 1989-06-28 康健 机电一体化轴流式管道泵

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911111A (en) 1958-07-22 1962-11-21 John Bass Ltd Improvements in centrifugal fan assemblies
US3312386A (en) * 1964-12-21 1967-04-04 Ametek Inc Fan
US3726611A (en) 1970-05-29 1973-04-10 Svenska Flaektfabriken Ab Fan unit designed as an air treatment device in an air conditioning aggregate
GB1326237A (en) 1970-12-10 1973-08-08 Blaws Eng Products Ltd Flue fan unit
FR2710700A1 (fr) 1993-09-27 1995-04-07 Abb Flakt Agencement d'un groupe moto-ventilateur monté en caisson.

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053948B2 (en) 2004-03-15 2021-07-06 Airius Ip Holdings, Llc Temperature destratification systems
US9714663B1 (en) * 2004-03-15 2017-07-25 Airius Ip Holdings, Llc Temperature destratification systems
US11703062B2 (en) 2004-03-15 2023-07-18 Airius Ip Holdings, Llc Temperature destratification systems
US11365743B2 (en) 2004-03-15 2022-06-21 Airius Ip Holdings, Llc Temperature destratification systems
US10487840B2 (en) 2004-03-15 2019-11-26 Airius Ip Holdings, Llc Temperature destratification systems
US8087887B2 (en) * 2008-03-28 2012-01-03 Delta Electronics, Inc. Fan and fan frame thereof
US20090246017A1 (en) * 2008-03-28 2009-10-01 Delta Electronics, Inc. Fan and fan frame thereof
US10184489B2 (en) 2011-06-15 2019-01-22 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US20130260664A1 (en) * 2012-03-30 2013-10-03 Rockwell Automation Technologies, Inc. Eccentric fan housing
USD926963S1 (en) 2012-05-15 2021-08-03 Airius Ip Holdings, Llc Air moving device
US11221153B2 (en) 2013-12-19 2022-01-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10655841B2 (en) 2013-12-19 2020-05-19 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11092330B2 (en) 2013-12-19 2021-08-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10641506B2 (en) 2013-12-19 2020-05-05 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10724542B2 (en) 2014-06-06 2020-07-28 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11713773B2 (en) 2014-06-06 2023-08-01 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11236766B2 (en) 2014-06-06 2022-02-01 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US11105341B2 (en) 2016-06-24 2021-08-31 Airius Ip Holdings, Llc Air moving device
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
US11421710B2 (en) 2016-06-24 2022-08-23 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
US10731668B2 (en) * 2017-05-17 2020-08-04 HELLA GmbH & Co. KGaA Retainer arrangement for the mounting of a fan on a light module of a headlamp for a vehicle
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
US10989209B2 (en) * 2017-09-30 2021-04-27 Beijing Xiaomi Mobile Software Co., Ltd. Fan
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake
US11781761B1 (en) 2019-04-17 2023-10-10 Airius Ip Holdings, Llc Air moving device with bypass intake
US20220290688A1 (en) * 2019-07-09 2022-09-15 Ziehl-Abegg Se Fan with scroll housing and scroll housing for fan
US11946486B2 (en) * 2019-07-09 2024-04-02 Ziehl-Abegg Se Fan with scroll housing and scroll housing for fan

Also Published As

Publication number Publication date
RU2384752C2 (ru) 2010-03-20
EP1657451A1 (en) 2006-05-17
RU2005135112A (ru) 2007-05-20
CN100523520C (zh) 2009-08-05
US20060127213A1 (en) 2006-06-15
CN1773125A (zh) 2006-05-17

Similar Documents

Publication Publication Date Title
US7311492B2 (en) Duct fan
US6551185B1 (en) Air intake and blowing device
US6537490B2 (en) Air inlet and outlet silencer structures for turbine
US6431974B1 (en) Acoustic wind band
JP6295434B2 (ja) 遠心送風機及びそれを用いた消音ボックス付送風機
WO2018032606A1 (zh) 油烟机
JP5147508B2 (ja) 換気送風機
WO2011086592A1 (ja) 送風装置
JP2009191721A (ja) ダクト接続アダプタと送風機
JP4779554B2 (ja) ダクトファン
WO2014174625A1 (ja) 空気調和機
JP5206365B2 (ja) 送風装置
KR20070111696A (ko) 배기용 후드
JP6524411B2 (ja) 換気装置
JP2001027200A (ja) トルネード型吸気・送風装置
JP2006046170A (ja) ダクトファン
JP3508632B2 (ja) トルネード型吸気・送風装置
EP1967741B1 (en) A duct fan
JP2007093115A (ja) ダウンブロー空調機の消音装置
KR102583841B1 (ko) 공기 순환용 송풍팬
JP3216617U (ja) 屋上換気扇
KR20130075384A (ko) 송풍팬 하우징
JP2009133618A (ja) 換気機能付き空気調和機
CN206770250U (zh) 一种轴流式消防排烟风机
EP1657450A1 (en) A plate for a fan

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20111225